WO2023195085A1

WO2023195085A1 - Heat exchanger and air heating and cooling device

Info

Publication number: WO2023195085A1
Application number: PCT/JP2022/017132
Authority: WO
Inventors: 剛志前田; 伸中村; 敦森田; 篤史 ▲高▼橋
Original assignee: 三菱電機株式会社
Priority date: 2022-04-06
Filing date: 2022-04-06
Publication date: 2023-10-12

Abstract

This heat exchanger is provided with a plurality of heat exchange members that are arranged in a first direction with gaps therebetween for allowing air to flow and that extend in a second direction that intersects the first direction. The plurality of heat exchange members each include: a body section which is constituted by an outer enclosure member having an internal space and a fin member separating the internal space into a plurality of channels, and through which a refrigerant flows; and a protruding section that protrudes from the body section in a third direction, which is the direction of the air flow and which intersects the first direction and the second direction, and that is constituted by a section of the outer enclosure member or fin member. The member, of the section outer enclosure member and the fin member, that forms the protruding section has a line-symmetric shape.

Description

Heat exchangers and air conditioning equipment

The present disclosure relates to a heat exchanger including a plurality of heat exchange members each having a tube shell and an inner fin, and an air conditioning/refrigeration device including the heat exchanger.

In a heat exchanger, a flat tube as a heat exchange member has a tubular tube shell as an outer shell (hereinafter also referred to as the outer shell member), and a wavy inner fin provided inside the tube shell (hereinafter also as the fin member). ). In the flat tube of such a heat exchanger, a plurality of flow paths through which a refrigerant flows are formed between the tube shell and the inner fin in the tube shell. By configuring the flat tube with a plurality of members such as a tube shell and inner fins, the mechanical strength of the flat tube increases.

JP2020-94786A

However, in the flat tube of Patent Document 1, the protruding part is formed by one end of the inner fin on the windward side or one end of the joint part of the tube shell, so that the protruding part of the inner fin and the tube shell is The members forming the section have an asymmetrical shape. Therefore, in the flat tube of Patent Document 1, when molding the inner fin and the member forming the protruding part of the tube shell, the same processing cannot be performed on both the upper and lower sides or on both the left and right sides, and the number of man-hours increases, or There was a problem in molding that the mold for the member forming the protrusion became complicated.

The present disclosure has been made to solve the above-mentioned problems, and aims to improve moldability in a heat exchanger and an air conditioning/refrigeration device that include a plurality of heat exchange members having protrusions. .

A first heat exchanger according to the present disclosure includes a plurality of heat exchange members arranged in a first direction with gaps through which air flows and extending along a second direction intersecting the first direction. Each of the plurality of heat exchange members is a heat exchanger, and each of the plurality of heat exchange members has a main body portion through which a refrigerant flows, and is configured of an outer shell member having an internal space and a fin member that divides the inner space into a plurality of flow paths. and a protruding portion formed of a part of the outer shell member or the fin member, protruding from the main body in a third direction that is the air flow direction and intersects with the first direction and the second direction. and, of the outer shell member and the fin member, the member forming the protrusion has a line-symmetrical shape.

Further, the second heat exchanger according to the present disclosure includes a plurality of heat exchange members arranged in a first direction with gaps through which air flows and extending along a second direction intersecting the first direction. A heat exchanger comprising: a first outer shell member that forms an internal space and divides the internal space into a plurality of flow paths; a second outer shell member provided along a part of the outer periphery of the first outer shell member in the third direction, with a direction intersecting the first direction and the second direction being a third direction; The projector further includes a main body through which a refrigerant flows, and a protrusion formed of a part of the second outer shell member and protruding from the main body in the third direction, and the protrusion is a part of the main body. The second outer shell member is provided on both sides of the second outer shell member in the third direction, and is constituted by both end portions of the second outer shell member, and the second outer shell member has a line-symmetrical shape.

Furthermore, an air conditioning/refrigeration device according to the present disclosure includes the above-described first heat exchanger or second heat exchanger and a compressor.

In the first heat exchanger according to the present disclosure, the protrusion is formed by a part of the outer shell member or the fin member, and the member forming the protrusion among the outer shell member and the fin member has a line-symmetrical shape. ing. Further, in the second heat exchanger according to the present disclosure, the protruding portion is configured at an end of the second outer member among the first outer member and the second outer member, and the second outer member has a line-symmetric shape. have. Therefore, in the first heat exchanger, the second heat exchanger, and the air conditioning/refrigeration device according to the present disclosure, since the protruding portion can be formed by a part of the line-symmetric member, the mold can be formed into a line-symmetric shape. In addition, the number of man-hours can be reduced by folding the parts on both the left and right sides or the top and bottom at the same time. Therefore, moldability can be improved in a heat exchanger and an air-conditioning/refrigerating device including a plurality of flat tubes each having an extending portion.

1 is a front view showing a schematic configuration of a heat exchanger according to Embodiment 1. FIG. 2 is a refrigerant circuit diagram of an air conditioner equipped with the heat exchanger of FIG. 1. FIG. 2 is a plan view of the heat exchanger shown in FIG. 1. FIG. FIG. 2 is a side view of the heat exchanger shown in FIG. 1; 5 is a sectional view showing the AA cross section of the heat exchange member shown in FIG. 4. FIG. 6 is a sectional view showing a first modification of the heat exchange member shown in FIG. 5. FIG. 6 is a sectional view showing a second modification of the heat exchange member shown in FIG. 5. FIG. 6 is a sectional view showing a third modification of the heat exchange member shown in FIG. 5. FIG. 6 is a sectional view showing a fourth modification of the heat exchange member shown in FIG. 5. FIG. 6 is a sectional view showing a fifth modification of the heat exchange member shown in FIG. 5. FIG. FIG. 6 is a side view showing an example of a turbulence promoting portion of the heat exchange member shown in FIG. 5; FIG. 3 is a cross-sectional view showing the configuration of a heat exchange member of a heat exchanger according to a second embodiment. FIG. 7 is a cross-sectional view showing the configuration of a heat exchange member of a heat exchanger according to Embodiment 3. FIG. 7 is a cross-sectional view showing a first modification of the heat exchange member of the heat exchanger according to Embodiment 3; FIG. 7 is a cross-sectional view showing the configuration of a heat exchange member of a heat exchanger according to Embodiment 4.

Hereinafter, a heat exchanger according to Embodiment 1 will be described with reference to the drawings and the like. Note that in the following drawings including FIG. 1, the relative dimensional relationships, shapes, etc. of each component may differ from the actual ones. In addition, in the following drawings, parts with the same reference numerals are the same or equivalent, and this is common throughout the entire specification. In addition, to facilitate understanding, we use terms that indicate directions (for example, "top", "bottom", "right", "left", "front", "back", etc.), but these notations are as follows: This is only described for convenience of explanation, and does not limit the arrangement or orientation of the device or parts. In the specification, the positional relationship between each component, the stretching direction of each component, and the arrangement direction of each component are, in principle, those when the heat exchanger is installed in a usable state.

Embodiment 1.
FIG. 1 is a front view showing a schematic configuration of a heat exchanger 101 according to the first embodiment. As shown in FIG. 1, the heat exchanger 101 includes a plurality of heat exchange members 10 arranged in a first direction, and a first header 30 and a second header connected to the ends of the plurality of heat exchange members 10. 40. In the first embodiment, the heat exchange member 10 is a flat tube. The heat exchange member 10 is arranged so that the tube axis Ax (see FIG. 5, which will be described later) is along a second direction D2 that intersects the first direction D1. As shown in FIG. 1, a gap G through which air flows is formed between adjacent heat exchange members 10 in the first direction D1. Air flows along a third direction D3 (see FIGS. 3 and 4 described below) that intersects with D2.

FIG. 2 is a refrigerant circuit diagram of the air conditioner 100 equipped with the heat exchanger 101 of FIG. 1. As shown in FIG. 2, the heat exchanger 101 constitutes a part of a refrigerant circuit 100c in which a refrigerant circulates in an air conditioning and cooling device such as the air conditioner 100, for example. Although an air conditioner is illustrated as an example of an air conditioning/cold/heat device provided with the heat exchanger 101, the air conditioning/cold/heat device may be, for example, a refrigerator, a vending machine, a refrigeration device, a water heater, or the like.

The air conditioner 100 includes a compressor 102, a heat exchanger 101, an expansion valve 105, an indoor heat exchanger 104, and a four-way valve 103. In this example, the compressor 102, heat exchanger 101, expansion valve 105, and four-way valve 103 are provided in the outdoor unit 100A, and the indoor heat exchanger 104 is provided in the indoor unit 100B.

The compressor 102, heat exchanger 101, expansion valve 105, indoor heat exchanger 104, and four-way valve 103 are connected to each other via a refrigerant pipe, thereby forming a refrigerant circuit 100c in which refrigerant can circulate. In the air conditioner 100, when the compressor 102 operates, a refrigeration cycle is performed in which the refrigerant circulates through the compressor 102, the heat exchanger 101, the expansion valve 105, and the indoor heat exchanger 104 while changing its phase.

The outdoor unit 100A is provided with an outdoor fan 107 that forces outdoor air to pass through the heat exchanger 101. The heat exchanger 101 exchanges heat between the outdoor air flow generated by the operation of the outdoor fan 107 and the refrigerant. The indoor unit 100B is provided with an indoor fan 106 that forces indoor air to pass through the indoor heat exchanger 104. The indoor heat exchanger 104 exchanges heat between a refrigerant and a flow of indoor air generated by the operation of the indoor fan 106.

The operation of the air conditioner 100 can be switched between cooling operation and heating operation. In FIG. 2, the direction of the refrigerant flow during the cooling operation is shown by a broken line arrow, and the direction of the refrigerant flow during the heating operation is shown by a solid line arrow. The four-way valve 103 is an electromagnetic valve that switches the refrigerant flow path according to switching between cooling operation and heating operation of the air conditioner 100. The four-way valve 103 guides the refrigerant from the compressor 102 to the heat exchanger 101 and the refrigerant from the indoor heat exchanger 104 to the compressor 102 during cooling operation, and directs the refrigerant from the compressor 102 indoors during heating operation. The refrigerant is guided to the heat exchanger 104 and the refrigerant from the heat exchanger 101 is guided to the compressor 102.

During cooling operation of the air conditioner 100, refrigerant compressed by the compressor 102 is sent to the heat exchanger 101. In the heat exchanger 101, the refrigerant emits heat to the outdoor air and is condensed. Thereafter, the refrigerant is sent to the expansion valve 105 , where the pressure is reduced, and then sent to the indoor heat exchanger 104 . Thereafter, the refrigerant takes in heat from the indoor air in the indoor heat exchanger 104 and evaporates, and then returns to the compressor 102. Therefore, during cooling operation of the air conditioner 100, the heat exchanger 101 functions as a condenser, and the indoor heat exchanger 104 functions as an evaporator.

During heating operation of the air conditioner 100, the refrigerant compressed by the compressor 102 is sent to the indoor heat exchanger 104. In the indoor heat exchanger 104, the refrigerant emits heat to the indoor air and is condensed. Thereafter, the refrigerant is sent to the expansion valve 105 , where the pressure is reduced, and then sent to the heat exchanger 101 . Thereafter, the refrigerant takes in heat from the outdoor air in the heat exchanger 101 and evaporates, and then returns to the compressor 102. Therefore, during heating operation of the air conditioner 100, the heat exchanger 101 functions as an evaporator, and the indoor heat exchanger 104 functions as a condenser.

FIG. 3 is a plan view of the heat exchanger shown in FIG. 1. FIG. 4 is a side view of the heat exchanger shown in FIG. 1. In FIGS. 1 and 3, solid white arrows indicate the flow direction of the refrigerant when the heat exchanger 101 is used as an evaporator. In addition, in FIGS. 3 and 4, the direction of air flow is indicated by a dashed white arrow. Hereinafter, the schematic configuration of the heat exchanger 101 will be described based on FIGS. 1, 3, and 4. Note that the illustrated heat exchanger 101 is an example, and its configuration is not limited to the configuration described in the embodiment, and can be modified as appropriate within the scope of the technology according to the embodiment.

In the following description, the tube axis direction of the heat exchange member 10 shown in FIG. It is defined that the arrangement direction of the members 10, that is, the first direction D1, is the left-right direction (arrow X direction) perpendicular to the direction of gravity. Further, it is defined that a third direction D3 parallel to the air flow direction in the heat exchanger 101 is a depth direction (arrow Y direction) perpendicular to the first direction D1 and the second direction D2. Note that the arrangement of the heat exchanger 101 is not limited to the above case.

As shown in FIG. 1, one end 13a of the plurality of heat exchange members 10 in the tube axis direction is connected to the first header 30. Further, the other ends 13b of the plurality of heat exchange members 10 in the tube axis direction are connected to the second header 40. The first header 30 and the second header 40 are arranged with their longitudinal direction facing the arrangement direction of the plurality of heat exchange members 10, that is, the first direction (arrow X direction). That is, the longitudinal directions of the first header 30 and the second header 40 are parallel to each other. In the following description, the first header 30 and the second header 40 may be simply referred to as headers without distinction.

(header)
The header is a cylindrical body with both ends closed, and a space through which a refrigerant flows is formed inside. The header extends in the first direction, and in the examples shown in FIGS. 1 to 3, has a rectangular external shape, and in a cross section perpendicular to the first direction, has a rectangular shape with long sides in the third direction. It has a cross-sectional shape.

Note that in FIG. 1, the outer shape of the header is a rectangular parallelepiped, but the shape is not limited. The outer shape of the header may be, for example, a cylinder or an elliptical cylinder, and the cross-sectional shape of the header can be changed as appropriate. Furthermore, the structure of the header is not limited to the above-mentioned cylindrical body with both ends closed, but may also be, for example, a structure in which plate-like bodies in which slits are formed are laminated. Further, the first header 30 and the second header 40 may have different external shapes or cross-sectional shapes.

Furthermore, the first header 30 and the second header 40 have

refrigerant flow ports

31 and 41, respectively, through which refrigerant can flow in and out. Specifically, the refrigerant flow port 31 is provided in a wall portion (the left wall portion of the first header 30 in FIG. 1) that constitutes one end of the first header 30 in the first direction D1, and A refrigerant flow port 41 is provided in a wall portion (the right wall portion of the second header 40 in FIG. 1) that constitutes one end in one direction D1. When the heat exchanger 101 functions as an evaporator, the refrigerant flow port 31 serves as an inlet for the refrigerant in the heat exchanger 101, and the refrigerant flow port 41 serves as an outlet for the refrigerant in the heat exchanger 101. Furthermore, when the heat exchanger 101 functions as a condenser, the refrigerant flow port 41 serves as an inlet for the refrigerant in the heat exchanger 101, and the refrigerant flow port 31 serves as an outlet for the refrigerant in the heat exchanger 101. In addition, in the first header 30 and the second header 40, the positions where the

refrigerant flow ports

31 and 41 are provided are not limited to the above-mentioned positions, and can be changed as appropriate.

Further, a plurality of insertion holes (not shown) are formed in the header upper wall portion of the first header 30 located on the lower side of the heat exchanger 101, and the plurality of insertion holes are connected to the plurality of heat exchange members 10. , and are provided in parallel in the first direction D1. The plurality of insertion holes are holes into which the lower end portions 13a of the plurality of heat exchange members 10 are inserted, and penetrate through the header upper wall portion of the first header 30 in the thickness direction, that is, the second direction D2. ing.

Further, a plurality of insertion holes (not shown) are formed in the header lower wall portion of the second header 40 located on the upper side of the heat exchanger 101, and the plurality of insertion holes are connected to the plurality of heat exchange members 10. Correspondingly, they are provided in parallel in the first direction D1. The plurality of insertion holes are holes into which the upper end portions 13b of the plurality of heat exchange members 10 are inserted, and are holes that penetrate the header lower wall portion of the second header 40 in the thickness direction, that is, the second direction D2. There is.

The ends 13a and 13b of the plurality of heat exchange members 10 are inserted into the first header 30 and the second header 40, respectively, and are joined by joining means such as brazing or adhesive.

As shown in FIG. 1, the heat exchanger 101 is a so-called finless heat exchanger that does not have corrugated fins or the like that connect the sides of the heat exchange members 10 between each of the plurality of heat exchange members 10. . That is, the plurality of heat exchange members 10 are connected only by the first header 30 and the second header 40. In the heat exchanger 101, heat exchange between the refrigerant and air is performed mainly in the heat exchange member 10. In the finless heat exchanger, the plurality of heat exchange members 10 have a narrow gap G, that is, an interval between the side surfaces, in order to increase heat exchange efficiency. The interval is set, for example, within a range of 1 [mm] or more and 3 [mm] or less.

Note that the heat exchanger 101 may include the above-mentioned corrugated fins separately from the heat exchange member 10. However, if the heat exchanger 101 is a finless heat exchanger, manufacturing steps such as joining the heat exchange member 10 and the corrugated fins are not required, and manufacturing is easier.

Next, an example of the operation of the heat exchanger 101 when the heat exchanger 101 is used as an evaporator will be described. As shown in FIG. 1 , a low-pressure gas-liquid two-phase refrigerant flows into the heat exchanger 101 from the refrigerant flow port 31 . In the heat exchanger 101 , the low-pressure gas-liquid two-phase refrigerant first flows into the first header 30 and is distributed by the first header 30 to each of the plurality of heat exchange members 10 . It flows through a flow path P (see FIG. 5 described later). In the plurality of channels P of each heat exchange member 10 , the low-pressure gas-liquid two-phase refrigerant flows in the second direction D<b>2 toward the second header 40 and passes through the heat exchange member 10 . At this time, the low-pressure gas-liquid two-phase refrigerant exchanges heat with the air flowing through the gap G between the heat exchange members 10 and the members constituting the heat exchange members 10, radiating heat to the air and evaporating. The refrigerant becomes a low-pressure gaseous refrigerant. The low-pressure gaseous refrigerants from the plurality of heat exchange members 10 flow into the second header 40 and merge therein. The low-pressure gaseous refrigerant that has joined in the second header 40 flows out of the heat exchanger 101 (for example, the compressor 102 in FIG. 2) from the refrigerant flow port 41 provided in the second header 40.

(Heat exchange member 10)
FIG. 5 is a cross-sectional view showing the AA cross section of the heat exchange member 10 shown in FIG. FIG. 5 shows a cross section of the heat exchange member 10 perpendicular to the tube axis Ax. Based on FIG. 5, the structure of the heat exchange member 10 will be explained in detail. As shown in FIG. 5, the heat exchange member 10 includes a main body portion 10a through which a refrigerant flows, and a protruding portion 10b protruding from the main body portion 10a toward the windward side or the leeward side. The cross section of the main body portion 10a perpendicular to the tube axis Ax has a width W1 in the first direction D1 (i.e., the arrangement direction of the heat exchange members 10) that is smaller than a width W3 in the third direction D3 (i.e., the air flow direction). It has a flat shape. Moreover, each protrusion part 10b of the heat exchange member 10 is formed in a plate shape that extends so as to protrude from the main body part 10a toward the windward side or the leeward side and also extends in the second direction D2. In particular, by providing the heat exchange member 10 with the protrusion 10b that protrudes to the windward side from the main body 10a, frost formation occurs preferentially on the protrusion 10b than on the main body 10a, thereby creating a gap between the main body 10a. blockage can be suppressed.

The main body portion 10a of the heat exchange member 10 is composed of an outer shell member 1 and a fin member 2 that divides the internal space of the outer shell member 1 into a plurality of flow paths P in the third direction. Each flow path P extends in the tube axis direction (ie, the second direction shown in FIG. 4) and communicates with a space formed inside each of the first header 30 and the second header 40. A refrigerant such as water, brine, HFC refrigerant, or HC (hydrocarbon) refrigerant flows through these flow paths P, for example. For the outer shell member 1, a metal material having high thermal conductivity such as aluminum, copper, or brass is used. Further, like the outer shell member 1, the fin member 2 is also made of a metal material having high thermal conductivity. Further, in the heat exchange member 10, the protruding portion 10b is constituted by a part of the outer shell member 1 or the fin member 2 that constitutes the main body portion 10a. That is, the heat exchange member 10 is constituted by the outer shell member 1 and the fin members 2. The outer shell member 1 and the fin members 2 that constitute the heat exchange member 10 are formed by roll forming or press forming. Of the outer shell member 1 and the fin member 2, at least the member forming the protrusion 10b has a line-symmetrical shape in a cross section perpendicular to the tube axis Ax.

Hereinafter, a configuration example of the heat exchange member 10 shown in FIG. 5 will be described. The heat exchange member 10 has protrusions 10b on the windward side and the leeward side of the main body part 10a in the third direction D3, which is the direction in which air flows. Each of the outer shell member 1 and the fin member 2 is formed from a single plate made of a metal material. The thickness of the plate material constituting the fin member 2 is thinner than the thickness of the plate material constituting the outer shell member 1, and the fin member 2 has a substantially wave shape.

Hereinafter, in a cross section perpendicular to the tube axis Ax of the main body portion 10a, when the fin member 2 is divided into two with an imaginary line L1 as a boundary that is parallel to the longitudinal direction of the flat shape, that is, the third direction D3, and passes through the tube axis Ax, the imaginary line A portion protruding from L1 to one side in the first direction D1 (the upper side in FIG. 5 and the left side of the heat exchanger 101 in FIG. 1) is referred to as a mountain portion 2a, and is located on the other side in the first direction D1 from the imaginary line L1. The portion that protrudes toward the lower side in FIG. 5 and the right side of the heat exchanger 101 in FIG. 1 is referred to as a valley portion 2b. The tops of the peaks 2a and troughs 2b of the fin member 2 are in contact with the inner surface of the outer shell of the main body 10a constituted by the outer shell member 1. In the fin member 2, the valley portion 2b is located at the center position in the third direction, and the fin member 2 has a line-symmetrical shape between the windward side (left side in FIG. 5) and the windward side (right side in FIG. 5). have. That is, the fin member 2 has a shape that is line symmetrical with respect to an imaginary line L2 that is parallel to the first direction D1 and passes through the tube axis Ax. Further, the fin end portions 2e on both sides of the fin member 2 in the third direction D3 are each formed in an arc shape along the inner surface of the outer shell of the main body portion 10a, and are in contact with the inner surface of the outer shell.

A layer for suppressing corrosion in the air, such as a zinc sacrificial layer, is provided on the outer surface of the outer shell of the main body portion 10a. Further, both surfaces of the fin member 2 are provided with a layer, such as a silica layer, that suppresses corrosion in the refrigerant. The outer shell member 1 constituting the outer shell of the main body portion 10a and the fin member 2 disposed inside the outer shell are joined by brazing. Therefore, for example, the outer shell member 1 is made of a plate material with a zinc sacrificial layer provided on one surface, and the outer shell member 1 is formed so that the surface provided with the zinc sacrificial layer is on the outside, and the outer shell member 1 is formed with a plate material provided with a silica layer. By arranging the fin member 2 inside the outer shell member 1, the corrosion resistance of the heat exchange member 10 against air and refrigerant can be ensured. Note that, similarly to the fin member 2, a layer for suppressing corrosion in the refrigerant may be provided on the inner surface of the outer shell of the main body portion 10a. In this case, in the plate material constituting the outer shell member 1, it is preferable to provide a silica layer on the surface opposite to the surface on which the zinc sacrificial layer is provided. The zinc sacrificial layer can be formed, for example, by thermal spraying. Alternatively, the outer shell member 1 having the zinc sacrificial layer may be made of a clad material.

The protruding portions 10b passing through the tube axis Ax are provided on both sides of the main body portion 10a in the third direction, and are formed at both end portions 1e of the outer shell member 1. The outer shell of the main body portion 10a is comprised of a region between the two ends 1e of the outer shell member 1. Specifically, the outer shell of the main body part 10a includes a main pipe part 10am having a substantially elliptical cross section, which is made up of the central part 1a of the outer shell member 1, and two parts connecting the main pipe part 10am and each protruding part 10b. It has a connecting part 1c. In other words, a part of the outer shell of the main body portion 10a in the circumferential direction has a double structure in which the plate materials of the outer shell member 1 are doubled. For example, in the outer shell of the main body portion 10a, a portion on one side in the first direction (the upper side in FIG. 5 and the left side of the heat exchanger 101 in FIG. 1) than the fin member 2 has a double structure. The main pipe portion 10am, which is formed by the center portion 1a of the outer shell member 1, has an outer joint portion 10aj in which the outer shell members 1 are joined to each other at a central position in the third direction D3. Each connecting portion 1c connects the outer joint portion 10aj of the main pipe portion 10am and the protruding portion 10b. The length Wb in the third direction of the protrusion 10b provided on the windward side is the same as the length Wb in the third direction of the protrusion 10b provided on the leeward side. The length Wb of the protruding portion 10b in the third direction may be determined based on the relationship with the width W3 of the main body portion 10a in the third direction. For example, the length Wb of each protrusion 10b in the third direction is determined such that the total length of the two protrusions 10b in the third direction is longer than the width W3 of the main body 10a in the third direction. Good. By providing the protruding portion 10b in this manner, the amount of heat exchanged by the heat exchange member 10 can be ensured. Therefore, it can be a finless heat exchanger, and compared to conventional heat exchangers with corrugated fins, problems such as poor bonding between corrugated fins and flat tubes are eliminated, and manufacturability is improved.

As described above, in the heat exchange member 10 shown in FIG. 5, the outer shell of the main body 10a has the outer joint 10aj at the center position in the third direction, and the outer shell 10aj extends from the main body 10a to the windward side and the leeward side. The lengths Wb of the two protrusions 10b in the third direction are the same. Therefore, in the heat exchange member 10 shown in FIG. 5, the outer shell member 1 forming the protrusion 10b has a line-symmetrical shape in a cross section perpendicular to the tube axis Ax. Specifically, the outer shell member 1 has a shape that is line symmetrical with respect to an imaginary line L2 that is parallel to the first direction and passes through the tube axis Ax. Furthermore, in the example shown in FIG. 5, the fin member 2 that does not include a protrusion also has a shape that is line symmetrical with respect to the virtual line L2, like the outer shell member 1. Note that the fin member 2 is formed asymmetrically with respect to the imaginary line L2 so that the flow path area of the windward side flow path P is larger than the flow path area of the leeward side flow path P in the third direction. It's okay.

In the outer shell of the main body part 10a, the ends of the central part 1a of the outer shell member 1 are joined to each other at the outer joint part 10aj, and the connecting part 1c of the outer shell member 1 and the center part 1a are joined to each other on both sides of the outer shell joint part 10aj. has been done. The parts of the outer shell member 1 are joined together, for example, by brazing.

Each end of the central portion 1a of the outer shell member 1 has a folded portion 1ae that is convex inward of the main pipe portion 10am, and the side surfaces of the two folded portions 1ae are joined at the outer shell joint portion 10aj. By configuring the outer shell joint portion 10aj in this way, it is possible to ensure a long brazing margin at the joint portion of the outer shell member 1, so that the pressure resistance strength is improved.

Further, the tips of the two folded portions 1ae are configured to come into contact with the valley portions 2b of the fin member 2 inside the main pipe portion 10am, and to sandwich the fin member 2 between the opposing portions of the main pipe portion 10am. There is. At the outer joint portion 10aj of the main body portion 10a, the side surfaces of the two folded portions 1ae are joined together, and the tips of the two folded portions 1ae are joined to the fin member 2.

Incidentally, as the plate material constituting the outer member 1, a clad material having a base material such as aluminum and coated with a brazing material on both sides of the base material may be used. By using a clad material as the plate material, when manufacturing the heat exchange member 10, there is no need for a step of applying a brazing material to the surface of the plate material, so that the manufacturability of the heat exchange member 10 can be improved.

In the heat exchange member 10 shown in FIG. 5, the outer shell of the main body part 10a and the protrusion part 10b are composed of the outer shell member 1 formed by bending a single plate made of a metal material multiple times, and the outer shell member 1 has a shape that is line symmetrical between the windward side and the leeward side. Therefore, during manufacturing, the same operation can be performed symmetrically, for example, by stacking the fin member 2 on the outer shell member 1 and bending the outer shell member 1 simultaneously on the windward side and the leeward side (that is, on the left and right sides in FIG. 5). . Therefore, the manufacturability of the heat exchanger 101 is improved compared to a conventional configuration in which the member forming the protrusion has an asymmetric shape. By making the outer shell member 1 line symmetrical, the mold can be made symmetrical, and the outer shell member 1 can be folded simultaneously on both sides of the axis of symmetry, so that the number of steps can be reduced. As a result, effects such as an improvement in processing speed or a reduction in equipment size can be obtained. Moreover, since the outer shell member 1 can be folded simultaneously on both sides of the symmetry axis, the molding accuracy is also improved. Further, since the shape of the heat exchange member 10 is symmetrical between the windward side and the leeward side, the amount of brazing filler metal required is the same on both sides (left and right in FIG. 5). Therefore, it becomes easier to ensure brazing properties when clad fins or thermal sprayed fins are used as the outer shell member 1.

By the way, in some conventional heat exchange members, the main body is made up of an outer shell member and a fin member having a line-symmetrical shape, and the protruding part is made of a plate material different from the outer shell member and the fin member. However, in such a heat exchange member, since one end of the protrusion is joined to the outer shell of the main body, the joint strength cannot be ensured. In addition, in the conventional configuration where bonding strength cannot be ensured, if the length of the protruding portion in the third direction D3 is increased, the bonded portion will easily come off, so it is not possible to provide a sufficient length, and the heat transfer area on the air side cannot be secured. Therefore, in order to ensure heat exchange capacity in a conventional heat exchanger, corrugated fins must be additionally provided, and the structure of the heat exchanger cannot be simplified.

When the heat exchange member 10 is roll formed, each of the outer shell member 1 and the fin member 2 is formed as follows. The heat exchange member 10 is formed by folding a plate-shaped material, for example, multiple times from the left and right sides with respect to the feeding direction (that is, from both sides in the direction perpendicular to the feeding direction) while the coil material, which is the material, is spread out on a plane and fed. Ru. The molding unit that molds the heat exchange member 10 includes, for example, a molding roll portion in which upper and lower roll pairs are provided in multiple stages in the feeding direction, and a flux coating portion disposed in front of the roll pairs forming the outer joint portion 10aj. and a cutting device that cuts the material coming out of the forming roll section to a predetermined length. When the heat exchange member 10 is roll-formed, in a configuration where members such as the outer shell member 1 and the fin member 2 have asymmetrical cross sections, the right side presses down when folding the left side of the material, and the right side presses when folding the right side of the material. The left side becomes a presser. As a result, the number of steps increases, the balance of the roll forming part, that is, the mold becomes unbalanced, and moldability deteriorates. Furthermore, if the length of the fold is short, precision of the mold is required, and moldability deteriorates.

Since the heat exchange member 10 is composed of multiple parts such as the outer shell member 1 and the fin members 2, the molding unit may be configured to include the same number of molding roll parts as the number of parts. In this case, two forming roll sections are arranged one above the other in the forming unit, the fin member 2 is placed on the outer shell member 1 on the exit side of each forming roll section, and then the fin member 2 is sandwiched between the outer shell member 1. It is preferable that the two be assembled together.

Note that the

ends

13a and 13b of the plurality of heat exchange members 10 in the tube axis direction are inserted into the first header 30 and the second header 40, respectively, so the

ends

13a and 13b have a configuration in which the protrusion 10b is removed. Good. In this case, it is preferable to form a notch for the protruding portion 10b in the portion of the material before molding where the

end portions

13a and 13b are to be formed.

Note that the configuration of the heat exchange member 10 is not limited to only the form shown in FIG. 5. Hereinafter, first to fifth modified examples of the heat exchange member 10 will be explained.

FIG. 6 is a sectional view showing a first modification of the heat exchange member 10 shown in FIG. 5. In the first modification shown in FIG. 6, the outer shell of the main body part 10a has an outer shell joint part 10aj in the center position in the third direction D3, where the ends 1e on both sides of the outer shell member 1 are joined together. In the first modification, as in the case shown in FIG. 5, the protrusions 10b of the heat exchange member 10 are provided on both sides of the main body portion 10a in the third direction D3, that is, on the windward side and the leeward side. However, in the first modification, each protrusion 10b is formed in the middle of the outer shell member 1, and each protrusion 10b has a double structure folded back at the tip farthest from the main body 10a. In the outer shell member 1, opposing portions forming the protruding portion 10b are joined.

Also in the first modification shown in FIG. 6, as in the case shown in FIG. 5, the protrusions 10b are formed of a part of the outer shell member 1, and are provided on both sides of the main body 10a in the third direction D3. There is. In a cross section perpendicular to the tube axis Ax, the outer shell member 1 forming the two protrusions 10b has a shape that is line symmetrical with respect to an imaginary line L2 that is parallel to the first direction D1 and passes through the tube axis Ax. . Further, like the outer shell member 1, the fin member 2 that does not include the protruding portion 10b also has a shape that is line symmetrical with respect to the virtual line L2. Therefore, in the first modification as well, the effect of improving moldability can be obtained as in the case shown in FIG. In addition, in the first modification, since the protrusion 10b has a double structure, the structure of the protrusion 10b is different from that in the example of FIG. Increases strength.

FIG. 7 is a sectional view showing a second modification of the heat exchange member 10 shown in FIG. 5. In the second modification shown in FIG. 7, the outer shell member 1 is composed of a first outer shell member 11 and a second outer shell member 12. Specifically, one half of the outer shell of the main body portion 10a in the first direction D1 is composed of the first outer shell member 11, and the other half is composed of the second outer shell member 12. Further, the fin member 2 has flat plate-like fin end portions 2e on both sides of the central portion having a substantially wave shape, and the length of the fin member 2 in the third direction D3 of the second modification is as shown in the figure. It is longer than the length of the fin member 2 in the third direction D3 shown in FIG.

The outer shell of the main body portion 10a has outer joint portions 10aj2 at both ends in the third direction D3, in which the first outer member 11 and the second outer member 12 are joined so as to sandwich the fin member 2 therebetween. Specifically, in the outer joint part 10aj2, a part of the fin end 2e on the center side of the fin member 2 is sandwiched between the end 11e of the first outer member 11 and the end 12e of the second outer member 12. There is. The protruding portions 10b are provided on both sides of the main body portion 10a in the third direction D3. Each protruding portion 10b is constituted by a fin end portion 2e of the fin member 2 that protrudes from the outer shell of the main body portion 10a in the third direction D3 via the outer joint portion 10aj2. Therefore, also in the second modification, since the member forming the two protrusions 10b (the fin member 2 in the second modification) has a line-symmetrical shape, the moldability is similar to that shown in FIG. The effect of improvement can be obtained. In addition, in the second modification, the protrusion 10b is made up of a part of the fin member 2, so compared to the example of FIG. Therefore, the outer shell member 1 does not need to be bent, and the moldability of the outer shell member 1 is further improved.

In the second modification, the first outer shell member 11 and the second outer shell member 12 that constitute the outer shell of the main body portion 10a are parts having the same shape. Further, each of the first outer member 11 and the second outer member 12 has a line-symmetrical shape.

FIG. 8 is a sectional view showing a third modification of the heat exchange member 10 shown in FIG. 5. In the third modification shown in FIG. 8, the outer shell member 1 includes two first outer shell members 11 and one second outer shell member 12 facing the two first outer shell members 11. Specifically, one half of the outer shell of the main body portion 10a in the first direction D1 is composed of two first outer shell members 11 adjacent to each other in the third direction, and the other half is composed of a second outer shell member 12. Ru. The two first outer shell members 11 are components having the same shape.

The outer shell of the main body part 10a has an outer joint part 10aj in which the one end parts 11e1 of the two first outer shell members 11 are joined to each other at the center position in the third direction D3, and a first It has an outer joint portion 10aj3 where the other end portion 11e2 of the outer member and the second outer member 12 are joined. Hereinafter, the outer joint 10aj at the central position may be referred to as a first outer joint, and the outer joints 10aj3 at both ends in the third direction D3 may be referred to as second outer joints.

In the third modification, the protrusion 10b is formed of a part of the second outer shell member 12. Specifically, the windward-side and leeward-side protrusions 10b are constituted by end portions 12e on both sides in the third direction D3 of the second outer shell member 12, each extending from the two outer shell joints 10aj3.

The center portion of the second outer shell member 12 has an inward convex portion 12p that protrudes toward the opposing first outer shell member 11 side. The inward convex portion 12p is formed by bending a plurality of locations in the third direction into a mountain shape in the plate material constituting the second outer shell member 12, and the opposing portions constituting the inward convex portion 12p are joined together. ing. In the second outer shell member 12, the inward convex portion 12p is provided corresponding to the position of the peak portion 2a of the fin member 2, and is configured to sandwich the fin member 2 between the inner surface of the first outer shell member 11 at the peak portion 2a. It is configured. The second outer shell member 12 has a line-symmetrical shape.

In the third modification as well, as in the case shown in FIG. It has a shape that is line symmetrical with respect to an imaginary line L2 that is parallel to D1 and passes through the tube axis Ax. Further, like the outer shell member 1, the fin member 2 that does not include the protruding portion 10b also has a shape that is line symmetrical with respect to the virtual line L2. Therefore, in the third modification as well, the effect of improving moldability can be obtained as in the case shown in FIG.

FIG. 9 is a sectional view showing a fourth modification of the heat exchange member 10 shown in FIG. 5. Also in the heat exchange member 10 shown in FIG. 9, as in the case shown in FIG. has a double structure in which the plate material of the outer shell member 1 is doubled. However, in the fourth modification, the outer shell member 1 includes a first outer shell member 13 that constitutes the main pipe portion 10am, an outer wall portion 10ao that covers a part of the outer periphery of the main pipe portion 10am, and two protrusions 10b. A second outer shell member 14. The two protrusions 10b are formed by the ends 14e on both sides of the second outer shell member 14 in the third direction D3, and the outer wall 10ao, which is the outer wall of the double structure, is formed from the ends of the second outer shell member 14. It is composed of a portion between portions 14e, that is, a central portion 14a.

The main pipe part 10am of the main body part 10a has a substantially rectangular cross section with a long side in the third direction D3 in a cross section perpendicular to the pipe axis Ax. The main pipe portion 10am has an outer joint portion 10aj4 at a central position in the third direction D3, where the ends 13e on both sides of the first outer member 13 are joined together. The outer wall portion 10ao of the main body portion 10a is provided to cover the outer joint portion 10aj4 of the main pipe portion 10am. The outer wall portion 10ao, which is formed by the central portion 14a of the second outer member 14, covers a wider area than half of the outer circumference of the main pipe portion 10am, which is formed by the first outer member 13. When the main pipe portion 10am has a substantially rectangular cross section as shown in FIG. It is provided to cover. The two protrusions 10b extending from both ends of the outer wall portion 10ao are provided flush with the long side of the main pipe portion 10am that faces the outer joint portion 10aj4.

Also in the fourth modification, as in the case shown in FIG. 5, the outer shell member 1 forming the two protrusions 10b is parallel to the first direction D1 and passes through the tube axis Ax in the cross section perpendicular to the tube axis Ax. The shape is symmetrical with respect to the virtual line L2. Each of the first outer member 13 and the second outer member 14 constituting the outer member 1 also has a shape that is line symmetrical with respect to the virtual line L2. Therefore, in the fourth modification as well, the effect of improving moldability can be obtained as in the case shown in FIG. Further, in the fourth modification, the double structure portion of the outer shell of the main body portion 10a is composed of the first outer shell member 13 and the second outer shell member 14, and the outer shell joint portion 10aj4 of the first outer shell member 13 on the inner side is It is covered by the second outer shell member 14 of. Therefore, even if the outer joint portion 10aj4 of the main pipe portion 10am comes off in the main body portion 10a, the outer wall portion 10ao of the main body portion 10a can prevent the refrigerant from leaking to the outside of the outer shell.

Note that the

ends

13a and 13b have a configuration in which the protrusion 10b is removed. Good. Note that the

ends

13a and 13b may have a configuration in which the connecting portion 1c is removed or a configuration including the connecting portion 1c. For example, when the heat exchange member 10 is molded by a procedure in which the first outer shell member 13, the fin member 2, and the second outer shell member 14 are each molded, and then these members are assembled and then cut, the

end portion

13a and 13b preferably include the connecting portion 1c. On the other hand, when the heat exchange member 10 is molded by a procedure of molding the first outer shell member 13 and the fin member 2, respectively, assembling and cutting these members, and then assembling the second outer shell member 14 that has been molded separately. For this reason, it is preferable that the

ends

13a and 13b do not include the connecting portion 1c.

FIG. 10 is a sectional view showing a fifth modification of the heat exchange member 10 shown in FIG. 5. In the fifth modified example shown in FIG. 10, the first outer shell member 13 and the second outer shell member 14 of the fourth modified example shown in FIG. 9 are fixed by caulking. Therefore, even when the outer shell member 1 is composed of a plurality of members, that is, the first outer shell member 13 and the second outer shell member 14, it is possible to eliminate the gap between the first outer shell member 13 and the second outer shell member 14 and bring them into close contact. Therefore, deterioration in heat exchange performance can be suppressed. In addition, temporary fixing before brazing is possible, improving productivity.

In the fifth modification, the main pipe part 10am of the main body part 10a has a substantially elliptical cross section having a long side in the third direction D3 in a cross section perpendicular to the pipe axis Ax, and the outer outer wall of the main body part 10a 10ao is provided so as to cover one long side including the outer joint 10aj4 of the main pipe portion 10am and two curved short sides. The two protrusions 10b are provided so as to be flush with the long side of the main pipe portion 10am that faces the outer joint portion 10aj4. The second outer member 14 that constitutes the outer wall portion 10ao of the main body portion 10a and the two protrusions 10b has an omega-shaped cross section.

Also in the fifth modification, the outer shell member 1 forming the two protrusions 10b is similar to the case shown in FIG. , has a shape that is line symmetrical with respect to an imaginary line L2 that is parallel to the first direction D1 and passes through the tube axis Ax. Further, like the outer shell member 1, the fin member 2 that does not include the protruding portion 10b also has a shape that is line symmetrical with respect to the virtual line L2. Therefore, in the fifth modification as well, the effect of improving moldability can be obtained as in the case shown in FIG.

Furthermore, as in the example shown in FIG. 5, the first modification in FIG. 6, or the third modification in FIG. In the case where the heat exchanger 10 is not provided on the side, each heat exchange member 10 is preferably arranged in the outdoor unit 100A (see FIG. 2) in which the heat exchanger 101 is provided so that the outer joint portion faces toward the inside of the unit. For example, in the heat exchanger 101 shown in FIG. The member 10 is arranged so that the outer joint is on the right side. In this way, by arranging the heat exchange member 10 so that the outer shell joint faces toward the inside of the machine, even if the outer shell joint comes off, leakage of refrigerant to the outside of the outdoor unit 100A can be suppressed.

Note that the structure of the heat exchanger 101 of the present disclosure may be applied to the indoor heat exchanger 104 provided in the indoor unit 100B in the air conditioning/cooling device shown in FIG. 2. In this case, in the indoor unit 100B shown in FIG. 2, each heat exchange member 10 is preferably arranged such that the outer joint of the heat exchange member 10 of the indoor heat exchanger 104 faces inward.

FIG. 11 is a side view showing an example of the turbulence promoting section 19 of the heat exchange member 10 shown in FIG. 5. As shown in FIG. 11, the protruding portion 10b of the heat exchange member 10 is provided with a turbulence promotion portion 19 that promotes generation of turbulence. The turbulence promoting portion 19 is formed, for example, on the surface 10bs of the protrusion 10b extending in the third direction D3. Here, the surface 10bs of the protrusion 10b extending in the third direction D3 refers to the left or right side surface of the protrusion 10b facing the gap G when the heat exchanger 101 is installed as shown in FIG. It is.

The turbulence promotion part 19 is, for example, a concave part or a convex part formed in the surface 10bs of the protrusion part 10b, and is configured to promote the flow of air passing through the gap G between the protrusion parts 10b of two adjacent heat exchange members 10. Creates turbulence. By creating turbulence, the efficiency of heat exchange with the air is improved. A plurality of turbulence promoting parts 19 are provided on the surface 10bs of the protruding part 10b. In the example shown in FIG. 11, the turbulence promoting portion 19 is a square-shaped recess. Then, on the surface 10bs of the protrusion 10b, a first region R1 in which only one turbulence promoting section 19 is provided in the third direction D3, and two turbulence promoting sections 19 are provided in a spaced apart manner in the third direction D3. The second regions R2 are provided alternately in the second direction. In the windward side protrusion 10b, the second region R2 and the first region R1 are provided alternately from the top, and in the leeward side protrusion 10b, the first region R1 and the second region R2 are provided alternately from the top. It is set in. With this configuration, the number of turbulence promotion parts 19 through which the air flowing in the third direction D3 along the heat exchange member 10 passes is the same at each height, so it is uniform regardless of the height. can generate turbulent flow.

Note that the configuration and shape of the turbulence promoting portion 19 are not limited to the above configuration, and may be, for example, a through hole penetrating the protrusion 10b in the first direction D1, or a cut and raised portion formed in the protrusion 10b. There may be. Further, the shape of each turbulence promoting part 19 and the arrangement of the plurality of turbulence promoting parts 19 on the surface 10bs of the protruding part 10b are not limited to the above case. For example, the turbulence promoting part 19 is configured with a rectangular slit extending in the second direction D2, and the turbulence promoting part 19, which is a slit, is formed on the surface 10bs of the protruding part 10b in the third direction D3 and in the second direction. A plurality of them may be arranged in each of D2 and D2. Further, the turbulence promoting section 19 may be provided only on the windward side protrusion 10b.

The turbulence promoting portion 19 may be formed on the outer shell member 1 before or after forming the outer shape of the heat exchange member 10 by, for example, bending the plate material forming the outer shell member 1 and the plate material forming the fin member 2. For example, it can be formed by sheet metal pressing. Note that the shape of the outer shell member 1 is a line-symmetrical shape, as long as the outer shape formed by bending the plate material constituting the outer shell member 1 in the same way in the second direction D2 is a line-symmetrical shape, and The turbulence promoting portions 19 may not be provided symmetrically between the windward side protrusion 10b and the leeward side protrusion 10b.

As described above, the heat exchanger 101 according to the first embodiment includes a plurality of heat exchange members 10. The plurality of heat exchange members 10 are arranged in a first direction D1 with gaps G through which air flows, and extend along a second direction D2 that intersects with the first direction D1. Each of the plurality of heat exchange members 10 has a main body portion 10a through which the refrigerant flows, and projects from the main body portion 10a in a third direction D3 that is the air flow direction and intersects the first direction D1 and the second direction D2. It has a protrusion 10b. The main body portion 10a includes an outer shell member 1 having an internal space, and a fin member 2 that divides the internal space into a plurality of channels P. The protruding portion 10b is constituted by a part of the outer shell member 1 or the fin member 2. Of the outer shell member 1 and the fin member 2, the member forming the protrusion 10b has a line-symmetrical shape.

As a result, the protruding part can be formed from a part of a line-symmetrical member, so the mold can be made into a symmetrical shape, and it is possible to perform processing such as folding the member on both the left and right sides or the top and bottom at the same time. Man-hours can be reduced. Therefore, formability can be improved in a heat exchanger including a plurality of flat tubes having extension portions. Furthermore, since the member can be folded on both sides at the same time, molding accuracy is also improved.

In addition, in some conventional heat exchange members (flat tubes), the fin member and the outer shell member of the protruding part are constructed as separate members, but in such a structure, the fin member and the outer shell member each have a line-symmetrical shape. Even if it is possible to do so, it is necessary to join the end of the protrusion to the outer shell member. As a result, the number of steps for aligning the members constituting the protrusion and the outer shell member increases, and since the ends of the members are joined together, it becomes difficult to ensure joint strength.

Further, the protruding parts 10b are provided on both sides of the main body part 10a in the third direction D3, and are constituted by the end parts 1e on both sides of the outer shell member 1. The outer shell of the main body part 10a has a main pipe part 10am formed of the central part 1a of the outer shell member 1. The main pipe portion 10am has an outer shell joint portion 10aj in which the outer shell members 1 are joined to each other at a central position in the third direction D3. Further, the outer shell of the main body portion 10a has a main pipe portion 10am, and two connecting portions 1c that connect the outer joint portion 10aj of the main pipe portion 10am and the protruding portion 10b. Thereby, the outer shell of the main body portion 10a and the two protruding portions 10b can be formed from one sheet of plate material.

Further, the outer shell of the main body portion 10a has an outer shell joint portion 10aj in which the ends 1e on both sides of the outer shell member 1 are joined to each other at the center position in the third direction D3. The protruding parts 10b are provided on both sides of the main body part 10a in the third direction D3, are formed in the middle of the outer shell member 1, and have a double structure folded back at the tip of the protruding part 10b.

Thereby, similarly to the example shown in FIG. 5, also in the first modification (see FIG. 6), the moldability of the outer shell member 1 that forms the protrusion 10b can be improved. Furthermore, when two protrusions 10b are formed at both ends 1e of the outer shell member 1 as in the example shown in FIG. Since the outer shell member 1 is folded back and the holding part of the mold becomes short, molding is difficult. On the other hand, in the first modification, the folded part of the outer shell member 1 constitutes the two protrusions 10b, so the entire double-structured protrusion 10b can be held down by the presser part of the mold, making it stable. The shape obtained is as follows.

In the second modification (see FIG. 7), the outer shell member 1 is composed of a first outer shell member 11 and a second outer shell member 12. The outer shell of the main body part 10a has outer joint parts 10aj2 at both ends in the third direction D3, in which the first outer shell member 11 and the second outer shell member 12 are joined so as to sandwich the fin member 2 therebetween. The protruding parts 10b are provided on both sides of the main body part 10a in the third direction D3, and are formed at the fin ends 2e on both sides of the fin member 2 that protrude from the outer shell of the main body part 10a in the third direction D3 via the outer joint part 10aj2. It is configured.

As a result, in the second modification, the two protrusions 10b are constituted by the fin ends 2e on both sides of the fin member 2, so that the outer shell member 1 is bent and the outer shell member 1 is folded as in the first modification. The moldability of the outer shell member 1 is improved compared to the case where two protrusions 10b are formed in one part. Specifically, the number of steps required for bending the outer shell member 1 can be reduced. In addition, springback due to bending is suppressed, and a stable shape can be obtained.

In the third modification (see FIG. 8), the outer shell member 1 is composed of two first outer shell members 11 and one second outer shell member 12 facing the two first outer shell members 11. . The outer shell of the main body part 10a has a second outer shell at a central position in the third direction D3 such that one end portions 11e1 of the two first outer shell members 11 are in contact with each other and the fin member 2 is sandwiched between them and the second outer shell member 12. It has a first outer joint part (outer joint part 10aj) joined to the outer member 12. Further, the outer shell of the main body portion 10a has a second outer joint portion (outer joint portion 10aj3) in which the other end portion 11e2 of each first outer member 11 and the second outer member 12 are joined at both ends in the third direction D3. has. The protruding portions 10b are provided on both sides of the outer shell of the main body portion 10a in the third direction D3, and are constituted by end portions 12e on both sides of the second outer shell member 12 extending from the second outer shell joint portion (outer shell joint portion 10aj3). ing. Thereby, in the third modification, the number of steps required for bending the outer shell member 1 can be reduced.

In the fourth modification (see FIG. 9), the outer shell member 1 includes a first outer shell member 13 and a second outer shell provided along a part of the outer periphery of the first outer shell member 13 in the third direction D3. It is composed of a member 14. The protruding parts 10b are provided on both sides of the main body part 10a in the third direction D3, and are constituted by the end parts 14e on both sides of the second outer shell member 14. The outer shell of the main body part 10a includes a main pipe part 10am made up of the first outer member 13, and an outer wall part 10ao made up of a portion between the ends 14e on both sides of the second outer member 14. The main pipe portion 10am has an outer joint portion 10aj4 at a central position in the third direction D3, where the ends 13e on both sides of the first outer member 13 are joined together. The outer wall portion 10ao is provided on the outer peripheral side of the main pipe portion 10am so as to cover the outer joint portion 10aj4 of the main pipe portion 10am. Thereby, in the fourth modification, refrigerant leakage via the outer joint portion 10aj4 can be suppressed.

In the fifth modification (see FIG. 10), the first outer member 13 and the second outer member 14 are fixed by caulking. As a result, in the fifth modification, even when the outer shell member 1 is composed of a plurality of members, that is, the first outer shell member 13 and the second outer shell member 14, the gap between the first outer shell member 13 and the second outer shell member 14 is Since the heat exchange performance can be kept in close contact with the heat exchanger without the heat exchanger, deterioration in heat exchange performance can be suppressed. In addition, temporary fixing before brazing is possible, improving productivity.

In each of the plurality of heat exchange members 10, the member forming the protruding portion 10b is connected to a line (imaginary line L1) that is parallel to the third direction D3 and passes through the tube axis Ax of the main body portion 10a, or in the third direction. It has a shape that is line symmetrical with respect to a line (virtual line L2) that is perpendicular to D3 and passes through the center of the heat exchange member 10 in the third direction D3. Thereby, the member forming the protrusion 10b can be molded using a mold that is symmetrical on both sides of the imaginary line L1 or on both sides of the imaginary line L2.

Embodiment 2.
FIG. 12 is a sectional view showing the configuration of the heat exchange member 10 of the heat exchanger 101 according to the second embodiment. In the first embodiment, the heat exchange member 10 had two protrusions 10b, but in the second embodiment, the heat exchange member 10 has only one protrusion. Note that components having the same functions and actions as those in Embodiment 1 are given the same reference numerals, and their explanations are omitted.

In the heat exchange member 10 shown in FIG. 12, the protruding portion 10b is provided only on the leeward side of the main body portion 10a. Note that the protruding portion may be provided on either the windward side or the leeward side of the main body portion 10a. However, if the protrusion 10b is provided on the windward side, frost will form on the protrusion 10b before the main body 10a through which the refrigerant flows in the heat exchange member 10, so that the gap between the adjacent main body 10a may be blocked. It can be suppressed.

The outer shell of the main body part 10a has a tube shape and is composed of the central part 1a of the outer shell member 1. The outer contour of the main body part 10a has a substantially elliptical cross section extending in the third direction D3 in a cross section perpendicular to the tube axis Ax of the main body part 10a. The outer shell of the main body portion 10a having a tubular shape is such that the outer shell members 1, that is, the ends of the central portion 1a of the outer shell members 1 are joined to one end of the third direction D3 (the leeward end in the example of FIG. 12). It has an outer joint part 10aj6. The protruding portion 10b is constituted by end portions 1e on both sides of the outer shell member 1 extending from the outer shell joint portion 10aj6. The ends 1e on both sides of the outer shell member 1 are in contact with each other and are joined by brazing or the like.

In a configuration in which the protrusion 10b is provided only on one of the windward side and the leeward side, the protrusion is arranged such that the length Wb of the protrusion 10b in the third direction D3 is longer than the width W3 of the main body 10a in the third direction The length Wb of 10b in the third direction D3 may be determined. By providing the protrusions 10b in this way, the heat exchange amount can be ensured by the heat exchange member 10, so there is no need to provide corrugated fins between the heat exchange members 10 as in the conventional case.

Each of the outer shell member 1 and the fin member 2 is formed from a single plate made of a metal material. Also in the second embodiment, the outer shell member 1 forming the protrusion 10b has a line-symmetrical shape. Specifically, the outer shell member 1 has a shape that is axisymmetric with respect to an imaginary line L1 that is parallel to the third direction 3D and passes through the tube axis Ax. Therefore, even if the protruding portion 10b is provided only on one of the windward side and the leeward side, the effect of improving moldability can be obtained as in the case where two protruding portions 10b are provided as in the first embodiment.

Furthermore, the fin member 2 that does not include the protruding portion 10b has a shape that is line symmetrical with respect to an imaginary line L2 that is parallel to the first direction D1 and passes through the tube axis Ax. By forming the outer shell member 1 and the fin members 2 in a line-symmetrical shape, all the parts constituting the heat exchange member 10 have a line-symmetrical shape, so that moldability is further improved.

In the heat exchanger 101 of the second embodiment, the outer shell of the main body 10a has an outer joint 10aj6 at one end in the third direction D3, where the outer members 1 are joined together, and the protrusion 10b has an outer joint 10aj6 at one end in the third direction D3. It is composed of both ends 1e of the outer shell member 1 that extend from the outer shell member 10aj6 and are in contact with each other. As a result, even if the heat exchange member 10 has only one protrusion 10b, the outer shell member 1 can be formed into a line-symmetrical shape, so that the effect of improving moldability can be obtained, as in the case of the first embodiment. Furthermore, in the second embodiment, since the outer shell of the main body portion 10a does not include a double structure, the amount of material used for the outer shell member 1 can be reduced compared to the examples shown in FIGS. 5, 9, and 10. .

Embodiment 3.
FIG. 13 is a cross-sectional view showing the configuration of the heat exchange member 10 of the heat exchanger 101 according to the third embodiment. In the heat exchange member 10 of the third embodiment, the outer shell member 1 includes a first outer shell member 130 and a second outer shell member 14, as in the case of the fifth modification of the first embodiment (see FIG. 10). A portion of the outer shell of the main body portion 10a in the circumferential direction has a double structure. However, in the heat exchange member 10 of the third embodiment, the first outer member 130 forming the main pipe portion 10am has an extension portion 130e that further extends from the outer joint portion 10aj4. Therefore, in the third embodiment, the main body portion 10a is composed of the center portion 130a of the first outer shell member 130, and the outer joint portion 10aj4 is formed by joining the ends of the center portion 130a of the first outer shell member 130. It is.

The extending portion 130e of the first outer shell member 130 has a substantially wavy shape with peaks 20a and troughs 20b, and functions as an internal fin 20 that divides the internal space of the main pipe portion 10am into a plurality of flow paths P. . Therefore, in the heat exchange member 10 of the third embodiment, the fin member 2 (see FIG. 10) in the fifth modification of the first embodiment is unnecessary.

Note that, of the first outer member 130 and the second outer member 14, the second outer member 14 forming the protrusion 10b is perpendicular to the third direction D3 and It has a line-symmetrical shape with respect to a line L2 passing through the center of the heat exchange member 10 in the third direction D3.

FIG. 14 is a sectional view showing a first modification of the heat exchange member 10 of the heat exchanger 101 according to the third embodiment. As shown in FIG. 14, the outer shell member 1 includes a first outer shell member 230 and a second outer shell member 14, and a portion of the outer shell of the main body portion 10a in the circumferential direction has a double structure. In the heat exchange member 10 of the first modification of the third embodiment, the first outer shell member 230 has a plurality of inward protrusions 230p that protrude inward from the main pipe portion 10am. The inward protrusions 230p are formed by folding back the first outer member 230, and the tips of the plurality of inward protrusions 230p in the first outer member 230 come into contact with opposing inner surfaces. The plurality of inward convex portions 230p function as internal fins 20 that divide the internal space of the main pipe portion 10am into a plurality of flow paths P. Therefore, in the first modification of the third embodiment as well, the fin member 2 (see FIG. 10) is unnecessary, as in the example of FIG. 13. In addition, in the first modification, the outer shell joint portion 10aj4 is formed by joining the ends 230e of the first outer shell member 230 to each other.

As described above, the heat exchanger 101 according to the third embodiment and its first modification (see FIGS. 13 and 14) includes a plurality of heat exchange members 10. The plurality of heat exchange members 10 are arranged in a first direction D1 with gaps G through which air flows, and extend along a second direction D2 that intersects with the first direction D1. Each of the plurality of heat exchange members 10 has a main body portion 10a through which the refrigerant flows, and projects from the main body portion 10a in a third direction D3 that is the air flow direction and intersects the first direction D1 and the second direction D2. It has a protrusion 10b. The main body portion 10a includes a first

outer member

130, 230 that forms an internal space and divides the inner space into a plurality of channels P, and a part of the outer periphery of the first

outer member

130, 230 in the third direction D3. and a second outer shell member 14 provided as shown in FIG. The protruding portion 10b is constituted by a part of the second outer shell member 14. Specifically, the protruding portions 10b are provided on both sides of the main body portion 10a in the third direction D3, and are constituted by the end portions 14e on both sides of the second outer shell member 14. The second outer member 14 has a line-symmetrical shape.

As a result, in the third embodiment and its first modification, as in the first embodiment, the protrusion 10b can be formed by a part of the line-symmetric component (here, the second outer shell member 14). Can be done. Therefore, also in the heat exchanger 101 of the third embodiment and its first modification, the moldability can be improved as in the case of the first embodiment.

Further, in the third embodiment (see FIG. 13), the main body portion 10a is composed of a central portion 130a of the first outer shell member 130, and the first outer shell members 130 are joined to each other at the center position in the third direction D3. The main pipe part 10am has an outer joint part 10aj4, and the part between the ends 14e on both sides of the second outer member 14 (i.e., the central part 14a), and the main pipe part 10am has an outer joint part 10aj4. It has an outer wall part 10ao provided on the outer circumferential side of 10 am, and internal fins 20 formed of both ends of the first outer member 130 and provided inside the main pipe part 10am. The plurality of flow paths P are formed by the main pipe portion 10am and the internal fins 20.

Alternatively, in the first modification of the third embodiment (see FIG. 14), the main body portion 10a is composed of a first outer shell member 230, and the ends of the first outer shell member 230 are placed at the center position in the third direction D3. The outer joint part of the main pipe part 10am is composed of a main pipe part 10am having an outer joint part 10aj4 where the parts 230e are joined together, and a part between the ends 14e on both sides of the second outer member 14 (i.e., the central part 14a). It has an outer wall part 10ao provided on the outer peripheral side of the main pipe part 10am so as to cover the main pipe part 10am, and a plurality of inward protrusions 230p that are made of the first outer member 230 and protrude inward from the main pipe part 10am. The plurality of flow paths P are formed by the main pipe portion 10am and the plurality of inward convex portions 230p.

Therefore, in the third embodiment and its first modification, the outer joint portion 10aj4 is covered by the second outer member 14, and the plurality of channels P are formed by the first

outer members

130, 230 forming the main pipe portion 10am. can do. Therefore, in the third embodiment and the first modification thereof, refrigerant leakage through the outer joint 10aj4 is suppressed as in the fourth modification and the fifth modification of the first embodiment (see FIGS. 9 and 10). This configuration can be realized with fewer parts.

Also, in the third embodiment and the first modification thereof, the first

outer shell members

130, 230 and the second outer shell member 14 are crimped, as in the case of the fifth variation of the first embodiment (see FIG. 10). It would be good if it was fixed. With such a configuration, the second outer member 14 can suppress the gap between the contact parts at the outer joint 10aj4 in the first

outer members

130, 230, and maintain the shape of the first

outer members

130, 230. Easy to do. Therefore, brazing performance, pressure resistance, and ease of assembling to the first header 30 and the second header 40 can be improved.

Embodiment 4.
FIG. 15 is a cross-sectional view showing the configuration of the heat exchange member 10 of the heat exchanger 101 according to the fourth embodiment. Heat exchanger 101 according to Embodiment 4 will be described. Heat exchanger 101 is obtained by changing the shape of heat exchange member 10 of heat exchanger 101 according to Embodiment 1. Embodiment 4 differs from Embodiment 1 in that heat exchange member 10 includes a plurality of main body parts 10a and a plurality of protrusions 10b. Note that components having the same functions and actions as those in Embodiment 1 are given the same reference numerals, and their explanations are omitted.

In the fourth embodiment, each of the plurality of heat exchange members 10 has a plurality of main body parts 10a and a plurality of protrusions 10b, and the plurality of protrusions 10b are different from the plurality of heat exchange members 10 in the same outer shell member 1 or fin member 2. It is composed of parts. Of the outer shell member 1 and the fin member 2, the members forming the plurality of protrusions 10b have a line-symmetrical shape.

As a result, the outer shell member 1 or the fin member 2 is shared by the plurality of main body parts 10a, so each heat exchange member 10 can be made up of a plurality of main body parts 10a connected to each other. Therefore, even in the heat exchanger 101 that includes a plurality of sets of headers (first header 30 and second header 40) shown in FIG. There is no need to increase it.

In the example shown in FIG. 15, the heat exchange member 10 has two main body parts 10a and three protruding parts 10b, and has a structure in which the main body parts 10a and the protruding parts 10b are alternately connected in the third direction D3. It has become. The heat exchange member 10 has a line-symmetrical shape with respect to an imaginary line L3 that passes through the midpoint C of the third direction D3 and is parallel to the first direction. The heat exchange member 10 also has a line-symmetrical shape with respect to an imaginary line L1 passing through the tube axes Ax of the two main body portions 10a parallel to the third direction D3. In the example of FIG. 15, the members forming the three protrusions 10b, that is, the fin member 2, have a line-symmetrical shape with respect to the virtual line L3. Therefore, as in the case of Embodiment 1, the effect of improving moldability can be obtained.

Although the embodiments have been described above, the present disclosure is not limited to the embodiments described above. For example, each embodiment may be combined. In the fourth embodiment, the heat exchange member 10 in which the heat exchange members 10 of the second modification of the first embodiment are connected has been described. The heat exchange member 10 of the first modification, the third modification, the fourth modification, or the fifth modification, or the example of FIG. 13 of the third embodiment or the sixth modification may be connected.

1 Outer shell member, 1a center part, 1ae folded part, 1c connection part, 1e end part, 2 fin member, 2a peak part, 2b trough part, 2e fin end part, 10 heat exchange member, 10a main body part, 10aj outer shell joint part , 10aj2 outer joint, 10aj3 outer joint, 10aj4 outer joint, 10aj6 outer joint, 10am main pipe, 10ao outer wall, 10b protrusion, 10bs surface, 11 first outer member, 11e End, 11e1 One end , 11e2 Other end, 12 Second outer member, 12e End, 12p Inward protrusion, 13 First outer member, 13a End, 13b End, 13e End, 14 Second outer member, 14a Center part, 14e End, 19 Turbulence promotion part, 20 Internal fin, 20a Peak, 20b Valley, 30 First header, 31 Refrigerant flow port, 40 Second header, 41 Refrigerant flow port, 100 Air conditioner, 100A outdoor unit , 100B indoor unit, 100c refrigerant circuit, 101 heat exchanger, 102 compressor, 103 four-way valve, 104 indoor heat exchanger, 105 expansion valve, 106 indoor fan, 107 outdoor fan, 130 first outer shell member, 130a center part , 130e Extension part, 230 First outer member, 230e End part, 230p Inward convex part, Ax Pipe axis, C Intermediate point, D1 First direction, D2 Second direction, D3 Third direction, G Gap, L1 Virtual line , L2 virtual line, L3 virtual line, P flow path, R1 first region, R2 second region.

Claims

A heat exchanger comprising a plurality of heat exchange members arranged in a first direction with gaps through which air flows and extending along a second direction intersecting the first direction,
Each of the plurality of heat exchange members is
A main body portion through which a refrigerant flows, which is configured by an outer shell member having an internal space and a fin member that divides the internal space into a plurality of flow paths;
a protruding portion formed of a part of the outer shell member or the fin member, protruding from the main body portion in a third direction that is the air circulation direction and intersects the first direction and the second direction; has
The member forming the protrusion among the outer shell member and the fin member has a line-symmetrical shape. Heat exchanger.
The protrusion portions are provided on both sides of the main body portion in the third direction, and are configured at both end portions of the outer shell member,
The outer shell of the main body is
a main pipe portion configured at a central portion of the outer shell member and having an outer joint portion where the outer shell members are joined to each other at a central position in the third direction;
The heat exchanger according to claim 1, further comprising two connecting portions connecting the outer joint portion of the main pipe portion and the protruding portion.
The outer shell of the main body portion has an outer shell joint portion at a central position in the third direction, where both ends of the outer shell member are joined to each other,
The protrusion part is provided on both sides of the main body part in the third direction, is formed of an intermediate part of the outer shell member, and has a double structure folded back at the tip of the protrusion part. Heat exchanger.
The outer shell member is composed of a first outer shell member and a second outer shell member,
The outer shell of the main body portion has outer joint parts at both ends in the third direction, where the first outer shell member and the second outer shell member are joined so as to sandwich the fin member,
The protruding portions are provided on both sides of the main body in the third direction, and are constituted by fin end portions on both sides of the fin member that protrude from the outer shell of the main body in the third direction via the outer joint. The heat exchanger according to claim 1.
The outer shell member includes two first outer shell members and one second outer shell member facing the two first outer shell members,
The outer shell of the main body portion is configured such that one end portions of the two first outer shell members are in contact with each other at a central position in the third direction, and the second outer shell member is arranged such that the fin member is sandwiched between the two outer shell members and the second outer shell member. a second outer shell joint having a first outer shell joint joined to the outer shell member, and having the other end of each first outer shell member and the second outer shell member joined at both ends in the third direction; has
The protruding portions are provided on both sides of the outer shell of the main body in the third direction, and are configured at both ends of the second outer shell member extending from the second outer shell joint. Heat exchanger as described.
The outer shell member includes a first outer shell member and a second outer shell member provided along a part of the outer periphery of the first outer shell member in the third direction,
The protrusion portions are provided on both sides of the main body portion in the third direction, and are configured at both end portions of the second outer shell member,
The outer shell of the main body is
a main pipe part that is configured of the first outer shell member and has an outer joint part in which both ends of the first outer shell member are joined to each other at a central position in the third direction;
an outer wall part configured of a portion between the both ends of the second outer shell member and provided on the outer peripheral side of the main pipe part so as to cover the outer joint part of the main pipe part. Heat exchanger described in.
The heat exchanger according to claim 6, wherein the first outer shell member and the second outer shell member are fixed by caulking.
The outer shell of the main body portion has an outer shell joint portion at one end in the third direction, where the outer shell members are joined to each other,
The heat exchanger according to claim 1, wherein the protruding portion is configured at both ends of the outer shell member that extend from the outer shell joint and are in contact with each other.
Each of the plurality of heat exchange members has a plurality of the main body portions and a plurality of the protrusion portions,
The plurality of protrusions are composed of a plurality of parts of the same outer shell member or the fin member,
The heat exchanger according to claim 1, wherein the members forming the plurality of protrusions among the outer shell member and the fin member have a line-symmetrical shape.
A zinc sacrificial layer is provided on the outer surface of the outer shell of the main body,
A silica layer is provided on both surfaces of the fin member or on the inner surface of the outer shell of the main body,
The heat exchanger according to any one of claims 1 to 9, wherein the outer shell of the main body portion and the fin member are joined by brazing.
In each of the plurality of heat exchange members, the member forming the protrusion is parallel to the third direction and passing through the tube axis of the main body, or perpendicular to the third direction and passing through the heat exchanger. The heat exchanger according to any one of claims 1 to 10, having a shape that is line symmetrical with respect to a line passing through the center of the exchange member in the third direction.
A heat exchanger comprising a plurality of heat exchange members arranged in a first direction with gaps through which air flows and extending along a second direction intersecting the first direction,
Each of the plurality of heat exchange members is
a first outer member that forms an internal space and divides the internal space into a plurality of flow paths; a third direction is a direction in which the air flows and intersects the first direction and the second direction; a second outer shell member provided along a part of the outer periphery of the first outer shell member in the third direction, and a main body portion through which a refrigerant flows;
a protruding portion configured by a part of the second outer shell member, protruding from the main body portion in the third direction;
The protrusion portions are provided on both sides of the main body portion in the third direction, and are configured at both end portions of the second outer shell member,
The second outer shell member has a line-symmetric shape. Heat exchanger.
The main body portion is
a main pipe section configured at the center of the first outer shell member and having an outer joint part where the first outer shell members are joined to each other at a central position in the third direction;
an outer outer wall section that is configured of a portion between the both ends of the second outer shell member and is provided on the outer peripheral side of the main pipe section so as to cover the outer joint section of the main pipe section;
internal fins configured at both end portions of the first outer shell member and provided inside the main pipe portion;
The heat exchanger according to claim 12, wherein the plurality of flow paths are formed by the main pipe portion and the internal fins.
The main body portion is
a main pipe part that is configured of the first outer shell member and has an outer joint part in which both ends of the first outer shell member are joined to each other at a central position in the third direction;
an outer outer wall section that is configured of a portion between the both ends of the second outer shell member and is provided on the outer peripheral side of the main pipe section so as to cover the outer joint section of the main pipe section;
a plurality of inward convex portions that are configured of the first outer shell member and protrude inward from the main pipe portion;
The heat exchanger according to claim 12, wherein the plurality of flow paths are formed by the main pipe portion and the plurality of inward convex portions.
In each of the plurality of heat exchange members, of the first outer shell member and the second outer shell member, the second outer shell member forming the protrusion is perpendicular to the third direction and The heat exchanger according to any one of claims 12 to 14, having a shape that is line symmetrical with respect to a line passing through the center in the third direction.
The heat exchanger according to any one of claims 1 to 15, wherein the surface of the protrusion extending in the third direction is provided with a plurality of recesses or protrusions, a plurality of through holes, or a plurality of cut-and-raised portions. exchanger.
The heat exchanger according to any one of claims 1 to 16,
Air conditioning and cooling equipment equipped with a compressor.